Roam, say, and ponder (6)
I believe the answer is:
wonder
'ponder' is the definition.
(wondering is a kind of pondering)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for wonder that I've seen before include "Feel curious" , "Marvel or question" , "Transmitted; despatched" , "Marvellous person; feel doubt" , "amazement" .)